/* Hallmark · macrostructure: Workbench · genre: playful · theme: studied-DNA (source: https://0x0800.github.io/2048-CUPCAKES/)
 * Hallmark · pre-emit critique: P5 H5 E5 S5 R5 V4
 * source: https://0x0800.github.io/2048-CUPCAKES/ · paper: warm cream · accent: frosting pink
 * observed type: Clear Sans · applied type roles: Bricolage Grotesque + Geist
 * hero: H4 score-led · product surface: F6 square avatar grid · nav: N9 · footer: Ft4
 * tone: lively-utilitarian · enrichment: supplied-avatar imagery · studied: yes · DNA-source: url
 * contrast: pass (40–41) · slop: pass (42–45) · honest: pass (46) · chrome: pass (47)
 * tokens: pass (48) · responsive: source-checked (34, 49, 50–57) · icons: pass (30)
 */
@import url("tokens.css");

*,
*::before,
*::after {
  box-sizing: border-box;
}

html,
body {
  overflow-x: clip;
}

html {
  min-width: 20rem;
  background: var(--color-paper);
  color: var(--color-ink);
  font-family: var(--font-body);
}

body {
  min-height: 100svh;
  margin: 0;
  padding-bottom: max(var(--space-lg), env(safe-area-inset-bottom));
  background: var(--color-paper);
  color: var(--color-ink);
  font-variant-numeric: tabular-nums;
}

button,
a {
  font: inherit;
  -webkit-tap-highlight-color: transparent;
}

button {
  white-space: nowrap;
}

img {
  max-width: 100%;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: clip;
  clip-path: inset(50%);
  white-space: nowrap;
  border: 0;
}

.frosting-edge {
  position: relative;
  height: var(--space-sm);
  background: var(--color-accent);
}

.frosting-edge::after {
  content: "";
  position: absolute;
  inset: calc(100% - var(--space-2xs)) 0 auto;
  height: var(--space-sm);
  background: radial-gradient(circle at 50% 0, var(--color-accent) 54%, var(--color-paper) 56%) 0 0 / var(--space-xl) var(--space-sm) repeat-x;
}

.topbar {
  padding-top: var(--space-sm);
}

.topbar__inner {
  width: min(100%, 44rem);
  min-height: 3.25rem;
  margin-inline: auto;
  padding: var(--space-sm) max(var(--space-md), env(safe-area-inset-right)) var(--space-sm) max(var(--space-md), env(safe-area-inset-left));
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-sm);
}

.brand {
  min-width: 0;
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  color: var(--color-ink);
  font-family: var(--font-display);
  font-size: var(--text-md);
  font-weight: 800;
  letter-spacing: -0.035em;
  line-height: 1;
  white-space: nowrap;
}

.brand__mark {
  position: relative;
  width: 1.45rem;
  height: 1.15rem;
  flex: 0 0 auto;
  border-radius: var(--radius-card) var(--radius-card) var(--radius-input) var(--radius-input);
  background: var(--color-accent);
}

.brand__mark::before {
  content: "";
  position: absolute;
  inset: auto var(--space-2xs) calc(-1 * var(--space-xs));
  height: var(--space-xs);
  border-radius: 0 0 var(--radius-input) var(--radius-input);
  background: var(--color-accent-2);
}

.brand__mark::after {
  content: "";
  position: absolute;
  width: var(--space-2xs);
  aspect-ratio: 1;
  inset: var(--space-2xs) var(--space-2xs) auto auto;
  border-radius: var(--radius-pill);
  background: var(--color-paper);
}

.topbar__actions {
  min-width: 0;
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: var(--space-xs);
}

.topbar__actions .btn {
  padding-inline: var(--space-sm);
}

.btn {
  --btn-face: var(--color-accent);
  --btn-ink: var(--color-accent-ink);
  --btn-edge: var(--color-accent-deep);
  min-width: 2.75rem;
  min-height: 2.75rem;
  padding: var(--space-sm) var(--space-md);
  border: var(--rule-thin) solid var(--btn-edge);
  border-radius: var(--radius-input);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--btn-face);
  color: var(--btn-ink);
  box-shadow: 0 var(--space-2xs) 0 var(--btn-edge);
  cursor: pointer;
  font-weight: 700;
  line-height: 1;
  transform: translateY(0);
  transition: transform var(--dur-micro) var(--ease-out), background-color var(--dur-short) var(--ease-out), opacity var(--dur-micro) var(--ease-out);
}

.btn--soft {
  --btn-face: var(--color-paper-2);
  --btn-edge: var(--color-rule);
  font-size: var(--text-sm);
}

.btn:focus-visible,
.board:focus-visible {
  outline: var(--rule-strong) solid var(--color-focus);
  outline-offset: var(--space-2xs);
}

.btn:active,
.btn[data-state="active"] {
  transform: translateY(var(--space-2xs));
  box-shadow: none;
}

.btn:disabled,
.btn[aria-disabled="true"] {
  opacity: 0.5;
  cursor: not-allowed;
  pointer-events: none;
  transform: none;
}

.btn[aria-busy="true"] {
  cursor: wait;
  opacity: 0.72;
}

.btn[data-state="error"],
.btn--soft[data-state="error"] {
  --btn-face: var(--color-accent-3-soft);
  --btn-edge: var(--color-error);
}

.btn[data-state="success"],
.btn--soft[data-state="success"] {
  --btn-face: var(--color-accent-2-soft);
  --btn-edge: var(--color-success);
}

.game-shell {
  width: min(100%, 34rem);
  margin-inline: auto;
  padding: var(--space-lg) max(var(--space-md), env(safe-area-inset-right)) var(--space-xl) max(var(--space-md), env(safe-area-inset-left));
  display: grid;
  gap: var(--space-md);
}

.heading-band {
  min-width: 0;
  display: grid;
  gap: var(--space-md);
  align-items: end;
  animation: reveal-in var(--dur-long) var(--ease-out) both;
}

.intro {
  min-width: 0;
}

.intro h1 {
  min-width: 0;
  margin: 0;
  color: var(--color-ink);
  font-family: var(--font-display);
  font-size: var(--text-display);
  font-style: normal;
  font-weight: 800;
  letter-spacing: -0.065em;
  line-height: 0.82;
  overflow-wrap: anywhere;
}

.intro h1 span {
  display: block;
  margin-block-start: var(--space-sm);
  color: var(--color-accent-2);
  font-size: 0.31em;
  letter-spacing: -0.035em;
  line-height: 1.1;
}

.intro p {
  max-width: 58ch;
  margin: var(--space-md) 0 0;
  color: var(--color-ink-soft);
  font-size: var(--text-base);
  line-height: 1.55;
}

.score-rack {
  min-width: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-xs);
}

.score-box {
  min-width: 0;
  min-height: 5.25rem;
  overflow: clip;
  padding: var(--space-sm);
  border-radius: var(--radius-input);
  display: grid;
  align-content: center;
  background: var(--color-accent);
  color: var(--color-accent-ink);
  container-type: inline-size;
}

.score-box:nth-child(2) {
  background: var(--color-accent-2);
  color: var(--color-photo-label);
}

.score-box__label {
  display: block;
  font-size: var(--text-xs);
  font-weight: 700;
  letter-spacing: 0.08em;
  line-height: 1.1;
  text-transform: uppercase;
}

.score-box__value {
  max-width: 100%;
  display: block;
  margin-block-start: var(--space-xs);
  font-family: var(--font-display);
  font-size: clamp(1.25rem, 6vw, 1.9rem);
  font-size: clamp(1.25rem, 22cqi, 1.9rem);
  font-weight: 800;
  letter-spacing: -0.06em;
  line-height: 0.9;
  white-space: nowrap;
}

.score-box.is-updated {
  animation: score-tick var(--dur-short) var(--ease-out);
}

.game-lede {
  border-block: var(--rule-thin) solid var(--color-rule);
  animation: reveal-in var(--dur-long) var(--ease-out) 60ms both;
}

.game-lede p {
  margin: 0;
  padding-block: var(--space-sm);
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: var(--space-xs) var(--space-md);
  line-height: 1.45;
}

.game-lede strong {
  font-family: var(--font-display);
  font-weight: 700;
}

.game-lede span {
  color: var(--color-ink-soft);
  font-size: var(--text-sm);
}

.board-wrap {
  min-width: 0;
  animation: reveal-in var(--dur-long) var(--ease-out) 120ms both;
}

.board {
  position: relative;
  width: min(100%, 30rem);
  aspect-ratio: 1;
  margin-inline: auto;
  padding: clamp(var(--space-xs), 2.8vw, var(--space-sm));
  border: var(--rule-strong) solid var(--color-board-edge);
  border-radius: var(--radius-board);
  background: var(--color-board);
  color: var(--color-photo-label);
  box-shadow: 0 var(--space-xs) 0 var(--color-board-edge);
  touch-action: none;
  user-select: none;
  -webkit-user-select: none;
}

.board__grid,
.board__tiles {
  position: absolute;
  inset: clamp(var(--space-xs), 2.8vw, var(--space-sm));
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  grid-template-rows: repeat(4, minmax(0, 1fr));
  gap: clamp(var(--space-2xs), 2vw, var(--space-xs));
}

.board__grid {
  z-index: var(--z-base);
}

.board__tiles {
  z-index: var(--z-raised);
  pointer-events: none;
}

.board-cell {
  border: var(--rule-thin) solid var(--color-cell-inner);
  border-radius: var(--radius-tile);
  background: var(--color-cell);
}

.tile {
  position: relative;
  grid-row: calc(var(--row) + 1);
  grid-column: calc(var(--col) + 1);
  min-width: 0;
  min-height: 0;
  margin: 0;
  overflow: clip;
  border: var(--rule-strong) solid var(--color-photo-label);
  border-radius: var(--radius-tile);
  background: var(--color-paper-3);
  isolation: isolate;
}

.tile img {
  width: 100%;
  height: 100%;
  display: block;
  object-fit: cover;
  object-position: var(--photo-position, center);
}

.tile__value {
  position: absolute;
  inset: auto var(--space-2xs) var(--space-2xs) auto;
  width: clamp(1.65rem, 7vw, 2.15rem);
  aspect-ratio: 1;
  z-index: var(--z-raised);
  padding: var(--space-3xs);
  border-radius: var(--radius-input);
  display: grid;
  place-items: center;
  background: var(--color-photo-scrim);
  color: var(--color-photo-label);
  font-family: var(--font-label);
  font-size: clamp(0.55rem, 2vw, 0.72rem);
  font-weight: 700;
  letter-spacing: -0.055em;
  line-height: 1;
  text-align: center;
}

.tile[data-value="16"] {
  --photo-position: center 38%;
}

.tile[data-value="64"] {
  --photo-position: center 34%;
}

.tile[data-value="128"],
.tile[data-value="256"],
.tile[data-value="512"] {
  --photo-position: center 40%;
}

.tile.is-new,
.tile.is-merged {
  animation: tile-pop var(--dur-short) var(--ease-out) both;
}

.tile--fallback {
  display: grid;
  place-items: center;
  background: var(--color-accent-2);
  color: var(--color-photo-label);
}

.tile--fallback .tile__value {
  position: static;
  width: auto;
  aspect-ratio: auto;
  padding: 0;
  background: none;
  color: var(--color-photo-label);
  font-size: clamp(0.82rem, 3vw, 1.2rem);
}

.game-aside {
  min-width: 0;
}

.progress-note {
  margin: 0;
  padding: var(--space-sm) var(--space-md);
  border-radius: var(--radius-input);
  background: var(--color-paper-2);
  color: var(--color-ink);
  font-weight: 700;
  line-height: 1.5;
}

.avatar-legend__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-sm);
  padding-block-end: var(--space-md);
  border-bottom: var(--rule-thin) solid var(--color-rule);
}

.avatar-legend-dialog .avatar-legend__title {
  margin: 0;
  font-size: var(--text-xl);
}

.avatar-legend__grid {
  padding-block: var(--space-sm) 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
}

.avatar-legend-dialog figure {
  min-width: 0;
  margin: 0;
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  align-items: center;
  gap: var(--space-md);
  padding-block: var(--space-md);
  border-bottom: var(--rule-thin) solid var(--color-rule);
}

.avatar-legend-dialog figure:last-child {
  border-bottom: 0;
}

.avatar-legend-dialog img {
  width: clamp(8rem, 46vw, 11rem);
  height: clamp(8rem, 46vw, 11rem);
  aspect-ratio: 1;
  display: block;
  border: var(--space-2xs) solid var(--color-board);
  border-radius: var(--radius-input);
  background: var(--color-cell);
  object-fit: cover;
}

.avatar-legend-dialog figcaption {
  color: var(--color-ink-soft);
  font-family: var(--font-label);
  font-size: var(--text-md);
  font-weight: 700;
  text-align: start;
}

.page-footer {
  color: var(--color-ink-soft);
  font-size: var(--text-sm);
  line-height: 1.55;
}

.page-footer p {
  margin: 0;
}

dialog {
  position: fixed;
  inset: 0;
  width: min(calc(100% - var(--space-md)), 30rem);
  height: fit-content;
  max-height: min(88svh, 42rem);
  margin: auto;
  padding: var(--space-lg);
  overflow: auto;
  border: var(--rule-strong) solid var(--color-board-edge);
  border-radius: var(--radius-card);
  background: var(--color-paper);
  color: var(--color-ink);
  box-shadow: 0 var(--space-xs) 0 var(--color-board-edge);
}

dialog::backdrop {
  background: var(--color-overlay);
}

.dialog__mark {
  width: 3rem;
  aspect-ratio: 1;
  border-radius: var(--radius-pill);
  display: grid;
  place-items: center;
  background: var(--color-accent);
  color: var(--color-accent-ink);
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 800;
}

dialog h2 {
  min-width: 0;
  margin: var(--space-lg) 0 0;
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-style: normal;
  font-weight: 800;
  letter-spacing: -0.045em;
  line-height: 1.05;
  overflow-wrap: anywhere;
}

dialog p {
  margin: var(--space-sm) 0 0;
  color: var(--color-ink-soft);
  line-height: 1.55;
}

.dialog__actions {
  margin-block-start: var(--space-lg);
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-sm);
}

.dialog__actions .btn {
  width: 100%;
  min-width: 0;
}

.score-card {
  margin: var(--space-lg) 0 0;
  padding-block-start: var(--space-md);
  border-top: var(--rule-thin) solid var(--color-rule);
  color: var(--color-ink);
}

.score-card[hidden],
.score-card__image[hidden] {
  display: none;
}

.score-card__image {
  width: 100%;
  max-height: 18rem;
  display: block;
  border-radius: var(--radius-input);
  background: var(--color-paper-2);
  object-fit: contain;
}

.score-card__status {
  min-height: 1lh;
  margin-block-start: var(--space-xs);
  color: var(--color-ink-soft);
  font-size: var(--text-sm);
  line-height: 1.5;
}

.star-burst {
  position: fixed;
  width: 1.5rem;
  height: 1.5rem;
  z-index: var(--z-toast);
  pointer-events: none;
  animation: star-burst var(--dur-long) var(--ease-out) forwards;
}

.star-burst::before,
.star-burst::after {
  content: "";
  position: absolute;
  inset: 0.62rem 0;
  border-radius: var(--radius-pill);
  background: var(--color-accent-3);
}

.star-burst::after {
  transform: rotate(90deg);
}

@keyframes reveal-in {
  from {
    opacity: 0;
    transform: translateY(var(--space-xs));
  }
  to {
    opacity: 1;
    transform: none;
  }
}

@keyframes tile-pop {
  from {
    opacity: 0.45;
    transform: scale(0.86);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

@keyframes score-tick {
  50% {
    transform: scale(1.025);
  }
}

@keyframes star-burst {
  from {
    opacity: 1;
    transform: scale(0) rotate(0deg);
  }
  to {
    opacity: 0;
    transform: scale(1.45) rotate(45deg);
  }
}

@media (hover: hover) and (pointer: fine) {
  .btn:hover {
    transform: translateY(calc(-1 * var(--space-3xs)));
  }

  .btn--soft:hover {
    background: var(--color-paper-3);
  }
}

@media (pointer: coarse) {
  .btn {
    min-height: 3rem;
  }
}

@media (min-width: 30rem) {
  .topbar__actions .btn {
    padding-inline: var(--space-md);
  }

  .heading-band {
    grid-template-columns: minmax(0, 0.9fr) minmax(14.5rem, 1.1fr);
  }

  .score-rack {
    align-self: end;
  }

}

@media (min-width: 40rem) {
  .topbar__inner {
    padding-inline: var(--space-lg);
  }

  .game-shell {
    padding-inline: var(--space-lg);
    padding-block-start: var(--space-lg);
  }

  .dialog__actions {
    display: flex;
    flex-wrap: wrap;
  }

  .dialog__actions .btn {
    width: auto;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    animation-duration: 1ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 1ms !important;
  }
}